microSD Card control function for DISCO-F769NI based on BD_SD_DISCO_F746NG library by Roy Krikke
Dependencies: BD_SD_DISCO_F769NI BSP_DISCO_F769NI
Fork of DISCO-F746NG_BLOCK_DEVICE_WITH_FAT_FILESYSTEM_ON_SDCARD by
Please refer following my Notebook page.
/users/kenjiArai/notebook/sd-card-control-new/#
org_main.cpp
- Committer:
- kenjiArai
- Date:
- 2018-04-07
- Revision:
- 4:0f7797c2d3fe
File content as of revision 4:0f7797c2d3fe:
#if 0 /* Example file of using SD/MMC Block device Library for MBED-OS * Copyright 2017 Roy Krikke * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * */ #include "mbed.h" #include "FATFileSystem.h" #include "SDBlockDeviceDISCOF746NG.h" #include <stdio.h> #include <errno.h> DigitalOut led (LED1); // Instantiate the Block Device for sd card on DISCO-F746NG SDBlockDeviceDISCOF746NG bd; FATFileSystem fs ("fs"); void return_error (int ret_val) { if(ret_val) printf ("Failure. %d\r\n", ret_val); else printf ("done.\r\n"); } void errno_error (void* ret_val) { if(ret_val == NULL) printf (" Failure. %d \r\n", errno); else printf (" done.\r\n"); } int main () { Serial pc (SERIAL_TX, SERIAL_RX); pc.baud(115200); printf("Start\n"); int error = 0; printf("Welcome to the filesystem example.\r\n" "Formatting a FAT, RAM-backed filesystem. "); error = FATFileSystem::format(&bd); return_error(error); printf("Mounting the filesystem on \"/fs\". "); error = fs.mount(&bd); return_error(error); printf("Opening a new file, numbers.txt."); FILE* fd = fopen("/fs/numbers.txt", "w"); errno_error(fd); for (int i = 0; i < 20; i++) { printf("Writing decimal numbers to a file (%d/20)\r", i); fprintf(fd, "%d\r\n", i); } printf("Writing decimal numbers to a file (20/20) done.\r\n"); printf("Closing file."); fclose(fd); printf(" done.\r\n"); printf("Re-opening file read-only."); fd = fopen("/fs/numbers.txt", "r"); errno_error(fd); printf("Dumping file to screen.\r\n"); char buff[16] = { 0 }; while(!feof (fd)) { int size = fread(&buff[0], 1, 15, fd); fwrite(&buff[0], 1, size, stdout); } printf("EOF.\r\n"); printf("Closing file."); fclose(fd); printf(" done.\r\n"); printf("Opening root directory."); DIR* dir = opendir("/fs/"); errno_error(fd); struct dirent* de; printf("Printing all filenames:\r\n"); while((de = readdir (dir)) != NULL) { printf(" %s\r\n", &(de->d_name)[0]); } printf("Closeing root directory. "); error = closedir(dir); return_error(error); printf("Filesystem Demo complete.\r\n"); // Blink led with 2 Hz while(true) { led = !led; wait (0.5); } } #endif